Reiter's disease, right hip

This code signifies a diagnosis of reactive arthritis (formerly known as Reiter's syndrome) affecting the right hip joint. Reactive arthritis is an autoimmune condition triggered by an infection elsewhere in the body, leading to inflammation of the joints, eyes, and genitourinary tract. The "right hip" specifies the anatomical location of the arthritic manifestation.

Use this code when documentation clearly indicates a diagnosis of Reiter's disease with specific involvement of the right hip. This typically occurs following a genitourinary or gastrointestinal infection. Supporting documentation should include physician notes detailing the diagnosis, affected joint, and possibly the preceding infection.

• Ensure the documentation explicitly states "Reiter's disease" or "reactive arthritis" and specifies the "right hip."
• Do not confuse with other forms of inflammatory arthritis if the documentation does not confirm reactive arthritis.
• Consider coding the underlying infection if it is still active and relevant to the current encounter, following sequencing guidelines.